The Los Angeles Lakers lead the Houston Rockets 3-1 in their first-round playoff series, but the bigger story may be happening off the court. Luka Doncic's hamstring rehab just hit a milestone that has Lakers fans paying close attention. Ahead of Game 4, OC Register's Benjamin Royer shared the full quote from Lakers head coach JJ Redick on Doncic's rehab progress: "He just continues to kind of do some stuff on the court. (He) was able to move a little bit today on the court, which, you know, most of the stuff had been stand-still. So he’s progressing, but no update on any timeline or anything like that." That might not sound like much, but context matters here. When Doncic first returned from Madrid, he was seen on the practice court doing light passing and rebounding work , nothing more. A few days later, he was getting shots up but staying mostly stationary . Moving on the court is a step beyond both of those, and for a Grade 2 hamstring strain, each of these stages has to happen in order.…